The most consequential part of the Permanent Court of Arbitration’s decision of 31 August 2026 in the Indus Waters Western Rivers Arbitration (Islamic Republic of Pakistan v. Republic of India) is not about a dam wall, a spillway or even Ratle. It is about something more fundamental: whether a state can unilaterally place a treaty “in abeyance” when the treaty itself does not give it that power.The answer given unanimously by the Court was no.
The Court found that India’s decision to place the Indus Waters Treaty (IWT) in “abeyance” was not permissible under the Treaty or the applicable rules of international law. The Treaty, the Court held, has neither been terminated nor suspended. It remains fully in force, and India remains bound by its obligations, including those relating to hydro-electric projects on the Western Rivers and the Treaty’s dispute-settlement machinery.
If sovereignty were enough, every treaty obligation could become conditional upon the political circumstances of the moment. A state could accept an obligation when convenient and suspend it when relations deteriorate. Treaty law would then become little more than diplomacy dressed in legal language. A treaty cannot remain meaningful merely because a court declares it to be in force; its authority depends upon the willingness of states to respect the obligations they have undertaken.
The PCA went on to examine India’s reliance on cross-border terrorism. The Court expressly said that it took the allegation extremely seriously. Yet it found that even assuming the allegation to be true, it would not establish a material breach of the IWT. The reason was not that terrorism is unimportant in international law. The Court’s reasoning was narrower: the IWT governs rights and obligations concerning the use of the waters of the Indus river system and does not regulate terrorism or the use of force. The Court also did not find evidence that the alleged terrorism had prevented India from constructing hydro-electric projects. It found no international armed conflict between India and Pakistan at the time under consideration and stated that, in any event, the Treaty was of a type that would remain operational during armed conflict. It noted that the IWT had remained in force through multiple conflicts since 1960.
Historically speaking, Pakistan has always shown grace and respect to international institutions. That contrast is visible in the Kulbhushan Jadhav proceedings before the International Court of Justice. Those proceedings were instituted by India against Pakistan.
Pakistan did not need to agree with India’s allegations in Jadhav in order to appear before the ICJ. It contested India’s claims through the forum competent to hear them. The same principle should apply in the IWT dispute: disagreement with a tribunal does not necessarily justify abandoning the process; it is precisely the reason to place the legal objections before the tribunal.
The international framework supports this approach. Article 33 of the UN Charter requires parties to disputes that may endanger international peace and security to seek solutions by negotiation, mediation, conciliation, arbitration, judicial settlement and other peaceful means of their choice. Article 35 permits a UN member to bring an appropriate dispute or situation to the attention of the Security Council or General Assembly, while Article 36 allows the Security Council to recommend procedures or methods of adjustment and requires it to take into account procedures already adopted by the parties.
Pakistan therefore has a strong basis for continuing to present itself as an advocate of institutional and peaceful settlement. It can point to the IWT’s Commission, Neutral Expert and arbitral mechanisms; to its participation in the PCA proceedings; and to its participation before the ICJ in the Jadhav case. None of this requires Pakistan to claim that it has never faced an adverse international-law finding. The more credible position is precisely that disputes should be decided by competent institutions and that states should engage with those decisions through law.
The way forward should consequently not be another cycle of unilateral action. Pakistan should continue to participate in the Permanent Indus Commission, the Neutral Expert proceedings and any remaining arbitral process; maintain the documentary and technical record required by the Treaty; and remain available for bilateral negotiations under Shimla Agreement.
The appropriate Pakistani message is therefore not that arbitration replaces diplomacy. It is that arbitration is diplomacy conducted through agreed legal institutions. Negotiation remains available. Mediation remains available where the Treaty permits it. Technical expertise remains available through the Neutral Expert. Arbitration remains available where the Treaty provides for it. These mechanisms are not competing alternatives; they are components of the same architecture.
Pakistan can also legitimately take the issue to broader UN diplomatic forums where the Charter’s requirements are met. But legal precision matters. The PCA is not the International Court of Justice, and Article 94 of the UN Charter concerns compliance with judgments of the ICJ, not PCA awards. The IWT itself, however, expressly makes an arbitral Award final and binding between the parties. Pakistan’s argument before the United Nations should therefore rest primarily on the sanctity of the treaty and the parties’ agreed dispute-settlement obligations, while Articles 33, 35 and 36 provide the broader peaceful-settlement framework.
Nor would it be legally correct to suggest that the five permanent members of the Security Council are automatically compelled to adopt a particular resolution concerning a PCA award. The Charter’s voting rules remain applicable to Security Council decisions. The stronger argument is instead that the Council and wider international community should attach serious weight to the preservation of treaty commitments and peaceful dispute-settlement mechanisms where the stability of relations between two nuclear-armed neighbors is involved.
For Pakistan, the strongest path is therefore one of consistency. Continue negotiating. Continue participating in international institutions. Continue using the mechanisms written into the Treaty. Continue accepting scrutiny of Pakistan’s own conduct. And where an international tribunal issues a binding decision, insist that the same principle of compliance applies to both sides.
The Indus Waters Treaty is not merely an agreement about rivers. It is a test of whether international commitments retain their force when political relations become difficult. The PCA has reaffirmed that they do. The next test is not before another court; it is before the states themselves. Whether the waters of the Indus become yet another source of confrontation, or remain an example of how even deeply divided states can manage disputes through law, dialogue and institutions, will depend on whether the parties choose to respect the framework they created. For Pakistan, continuing to stand within that framework is not simply a diplomatic posture, it is the strongest possible argument for the principle that international law must remain binding when it is inconvenient, not only when it is convenient.
The writer is a former Judge and Lawyer based in Islamabad and can be reached at judgemajid@hotmail.com